Valve.



No. 633,463. Patented Sept. 19, I899;

J. F. mums.

VALVE.

Application filed June 28, 1899.)

(N0 Model.)

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Unit En STATES PATENT Garrett JAMES F. MARKS, OF MATTOON, ILLINOIS.

VALVE.

SPECIFICATION forming part of Letters Patent No. 633,463, datedSeptember 19, 1899.

Application filed lune 28,1899.v Serial 110,722,135. (No model.)

To all whom it may concern:

Be it known that I, JAMES F. MARKS, a citizen of the United States,residing at Mattoon, in the county of Coles and State of Illinois, haveinvented certain new and useful Improvements in Valves; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention consists in an improvement in valves for use with waterunder-high pressure, and has for its object the production of a valvenearly frictionless, almost balanced, and water-tight at the stem.

In the accompanying drawings, Figure 1 represents a view, part in planand part in horizontal section, on line CD of Figs. 2 and 23. Fig. 2represents an end view at the outlet end of the valve, and Fig. 3represents a vertical section on line A B of Fig. 1.

In the drawings like characters indicate like parts.

0 indicates the cylindrical valve-casing, which has an inlet m at oneend and an outlet a at the other. This casing is'enlarged at the middleby a circular depression p at the bottom, bulging out and downwardly,and a circular opening q directly above said de pression, covered by ahollow cap f, which is provided with a peripheral flange f, throughwhich screws f pass into the raised rim q of said opening 1 to fastendown said cap tightly. This capf is provided with a hollow rectangularprojection F at the side toward the outlet n,said projection beingfastened by screws I and lugs F to the end of easing O. The end of thevalve-box, formed by the said depression p and cap f, which is nearestto the inlet m is closed by an arched bridge 7', integral with saidcasing and projecting laterally into the said valve-box. This bridge isfiattened at the top and bottom and provided with circular perforationstherein, which act as valve-seats s and 8'. These valve-seats havespherical sidewalls slanting downward and inward, and the uppervalve-seat s is somewhat larger in diameter than the lower one. In thesevalve-seats s and s valvedisks 6 and 6, respectively, corresponding inshape and size, rest normally and are connected together by a rigid bar6 so as virtually to form one valve. The motion of this double valve isguided by means of vertical guide-ridges d for the upper disk 6, formedon the inner side of the aforesaid raised rim g of opening q, and a pin(1', projecting downwardly from the under side of the disk 6 and slidingvertically in a tubular projection 17, rising from the bottom of thedepression pin the valve-casing.

Passing through one side of the hollow projection F of the cap f is atubular sleeve g, in which fits a stem a, one end of a lever Z beingattached at right angles to the outer end of said stem. To the inner endis fastened perpendicularly a crank b, which projects into the valve-boxand is pivoted to one end of a link I, which is pivotally fastened atits other end to the top of the upper valve-disk 8'. This sleeve gprojects slightly into the hollow projection F and forms a tightgroundjoint with the side of the crank b. The tightness of this joint isinsured by an adjusting-screw h, which projects through a screwthreadedhole h in the opposite wall of the projection F in line with the stem (0to hold the crank 1) against the sleeve g. A coiled spring 2', whichsurrounds said screw between the crank Z) and the side wall of thehollow projection F, preserves the tightness of the said ground-joint.In operation the screw h should be loosened, allowing the coiled spring1 to maintain the ground-jointj;

The operation of my invention is as follows: \Vater under pressureenters the inlet m and by its pressure against the upper disk e of thevalve, which pressure is slightly greater than against the lower disk 6on account of the diiference in area of the two disks, causes the valveto rise, thereby opening the valve at thetop and bottom and permitting afull flow of water from the inlet 'm to the outlet n. The valve isclosed by the lever Z, which turns the stem at, and by means of thecrank Z7 and link if depresses the valve till it rests securely in itsseats.

By means of thetwo disks e and e I obtain a nearly-balanced valve,requiring little force to close, and by means of the adj usting- 'screw71 spring 1', and ground-jointj the valve is rendered always water-tightand a stn ffingbox and its friction dispensed with.

V This valve may be regulated by an automatic mechanism attached to thelever Z or by other means.

Havingthus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In combination with a tubular valve-cas ing open at both ends,avalve-box located at the middle of said casing and formed by anenlargement of the same, an arched bridge closing the inlet to said boxand projecting laterally into the said box, valve-seats in the upper andlower sides of said bridge, a valve composed of two rigidly-connecteddisks resting in said seats when the valve is closed, one of said disksand its corresponding seat being of greater diameter than the other,guides for said valve in said valve-box, and means for operating saidvalve, substantially as set forth.

2. In combination with a tubular valve-casing, a valve in said casingmoving perpendicularly thereto, said casing having an opening in its topabove said valve, a hollow cap covering said opening and having a hollowrectangular projection at one side, a tubular sleeve passing through aside wall of said projection, a cylindrical stem passing through to theinner end of the same, a link pivotally connecting said crank and saidvalve, said crank forming a ground-joint with the inner end of saidsleeve, an adjusting-screw passing through the opposite wall of saidhollow projection of the casing, and a coiled spring surrounding saidscrew between the said wall and said crank, substantially as and for thepurpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES F. MARKS.

Witnesses:

J. A. MOFALL, HORACE W. ToLLE.

